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Do you know that for sure? Keep in mind if it does, he would have to completely erase his hard drive and then purchase a copy of Mountain Lion. Also, I don't believe that it would solve his current problem trying to install Win 7 x 64 Pro.

I'm definitely a she!

The MBA is new so I don't have any data besides an ISO on the desktop to lose. I am not sure whether I trill resolve my issue....to revert to Mountain Lion but at least I can say I tried that and can eliminate that possible solution.

Apple are due to call me again, tomorrow so I'll post an update on here. My issue is apparently with the senior engineering team. I can't wait to hear what they have to say on this. I hope they come up with a proper explanation for this. I refuse to give up so I hope there is a way to resolve my issue. This MBA should be able to deal with a Win 7 Pro x64 install.

Apple support did not have an update on this from the engineers so I'll be contacting them with the links above to let the know what worked for me and hopefully it will save many others a lot of time and stress.

I really enjoyed posting in my little thread. It was nice to vent and have a place where I could ask questions and not feel so hopeless.

I heard from the apple support tech who informed me the engineers suggested a corrupt ISO! Can you believe that. I had already eliminated that because we use these the ISO files regularly on other machines. We tried a few different ISOs/versions of Windows. I told the support guy to email the fix to the engineering team and tell them it was not a corrupt ISO!! I expected more from Apple support.

As the struggle was real, I thought I would also participate in this thread and share my testimonial with you.

For more than a week, I had been attempting to set up Windows 7 x64 on my mid-2014 MacBook Air 13", but to no avail. I was so sick of witnessing the infamous black screen, "no bootable device -- insert boot disk and press any key", or the "select your language" window in the Windows 7 PE with no keyboard nor mouse alive, that I had almost given up on it all.

<Edit> As the above link seems to be (momentarily?) broken, here are the EXACT steps I followed:"use a usb2 only flash drive, don't use usb3
disconnect all usb devices except for the flash drive you're using to install windows
before you try with the usb2 key, restart the machine and do a PRAM reset the open disk utility and repair permissions TWICE
open bca to remove/delete the prior windows partition (3rd box)
then restart bca, check all 3 options and report back".

That is basically it. At the end of the very last step ("restart bca, check all 3 options"), BootCamp will reboot the computer automatically, so make sure not to press any key (i.e. don't press alt-option, just let it reboot on its own).

My specs:
- Mid-2014 MacBook Air 13" with pre-installed Mac OS 10.9 (Mavericks)
- Windows 7 x64 Home Premium ISO file
- The most basic USB 2.0 flashdrive one can get
- (Note: I did not have rEFIt installed)

krissy, THANKS A BILLION for taking the time to give us an update and share the trick with us on this forum! I signed up on Mac Forums just so I could thank you!
That turbostar guy must be some kind of wizard, for sure!

As a student in aerospace engineering, being able to work on Mac or Windows as I please is a real lifesaver; many high-end CAD programs are only available on Windows platforms. I can now finally work in peace!

krissy, THANKS A BILLION for taking the time to give us an update and share the trick with us on this forum! I signed up on Mac Forums just so I could thank you!
That turbostar guy must be some kind of wizard, for sure!

As a student in aerospace engineering, being able to work on Mac or Windows as I please is a real lifesaver; many high-end CAD programs are only available on Windows platforms. I can now finally work in peace!

So once again, thank you so much!
Take care,
tm

Hi turbomachinsky! Awww you're welcome that's really kind of you. Turbostar really saved me so I wanted to share the fix which worked for me.

I am so happy you found this post and it was able to assist you in fixing your problem!

I know how you feel believe me, so I'm really happy for you that you are able to use all your programs